2007-09-19 04:09:41 · 6 answers · asked by Preethikrish 1 in Science & Mathematics ➔ Biology
A fog machine (also called a smoke machine) is a device which emits a dense vapor that appears similar to fog or smoke. This artificial fog or smoke is known as theatrical smoke and fog within the entertainment industry. Most fog machines create the fog by either vaporizing a water and glycol-based or glycerine-based fluid or a mineral-oil-based fog via atomization. For glycol-based fogs, the fluid (fog juice) is injected into a heated block, and evaporates quickly. The resulting pressure forces the vapor out of the exit. Upon coming into contact with cool outside air the vapor forms a fog.
2007-09-19 04:18:43 · answer #1 · answered by Jeri 3 · 0⤊ 0⤋
Dry ice in water.
Dry ice is solid CO2 (carbon dioxide) which sublimates (evaporates directly into a gas, without passing through a liquid stage) above -78oC.
If the dry ice is put in water, as it sublimates it generates a cloud of dense fog which sinks to the ground, and can be blown around by fans for dramatic effect. It does this by cooling the air (even though it has sublimated, it is still cold) and causing precipitation of water vapour into droplets, which form the fog. This fog creeps along the ground because CO2 is denser than air, and will sink.
2007-09-19 13:03:16 · answer #2 · answered by gribbling 7 · 0⤊ 0⤋
Which type? The "fog" that is used to effects or the natural kind.
The fog that is used for theatrical effects is nothing more than water warmed up and then turned in to a fine mist, then blown across the stage.
The other you may see is either dust or steam. You will see dust indoors. Usually does not rise much, maybe a foot off stage. Steam you will see at outdoors concerts. It is nothing more than the perspiration from people as it evaporates.
2007-09-19 12:11:34 · answer #3 · answered by Anonymous · 0⤊ 0⤋
In my days as a Thespian, we used dry ice to create a smoke effect onstage. That was some 20 years ago, I assume they probably use something a little less dangerous now. I have no idea what it is though, sorry.
2007-09-19 11:20:22 · answer #4 · answered by sheyna 4 · 0⤊ 1⤋
There are commercial "fog" machines that drop oils onto a heating element and then blow the resulting fumes out to provide a sultry atmosphere.
2007-09-19 11:19:20 · answer #5 · answered by Rich Z 7 · 0⤊ 0⤋
Dry ice. Solid 02.
2007-09-19 11:21:08 · answer #6 · answered by Peter Griffin 6 · 0⤊ 1⤋